If you tap the satellite bars, the next screen shows the application version number. Then tap the version number and the following screen shows the map installed and its version number.
That's a fair question. I gather for that model, everything is stored on a sd card and then the card is inserted in the unit in the car???If so, you may try this, Take the sd card and put it in a card reader. Delete the mapsettings.cfg file (found in the map folder). This will delete all your favourites, recent destinations, home location but a new mapsettings.cfg will be recreated when you turn on the unit.See if that stops the rebooting.
The Clear Flash tool can be found here:http://us.support.tomtom.com/app/answers/detail/a_id/6211/kw/clear flashDownload it and run 3 times with the unit connected to the computer.
I'm curious how many of you are still using the AVN2210p and how many of you have moved on to another device.